/Engine/Source/Runtime/Engine/Public/Animation/AnimCurveTypes.h
If CurveToCombine contains a valid element, then the value in 'this' is overridden, otherwise the value is not modified.
template<typename OtherAllocator, typename OtherElementType> void Combine ( const [TBaseBlendedCurve](API\Runtime\Engine\Animation\TBaseBlendedCurve)< OtherAllocator, OtherElementType > & CurveToCombine )